Mastering English Conditionals and Relative Pronouns

English Grammar: Conditionals

First Conditional

The first conditional expresses a possible future condition, describing situations or connections between events that are likely to happen. It is used to refer to possible results and actions.

Structure: If + present simple + will + infinitive (without to) / imperative

Example: If he invites me, I will go to the party.

Second Conditional

The second conditional expresses an unreal present or future condition, describing situations that are unlikely to happen. The verb in the past tense does not refer to the past, but rather to a condition that does not exist in reality.

Structure: If + past simple + would/could/might + infinitive (without to)

Example: If I had money, I would buy an ice cream.

Third Conditional

The third conditional expresses an unreal past, describing a connection between events that did not happen. It is used to express an imagined outcome of a past situation.

Structure: If + past perfect + would/could/might + have + past participle

• If I had studied, I would have passed the exams.
• If I had studied, I could have passed the exams.
• If I had studied, I might have passed the exams.

Relative Pronouns

Who

Used when referring to a person as the subject of the clause.

Example: The man who lives on your floor wants to talk to you.

Whom

Similar to "who," but used to refer to a direct object or as the object of a preposition.

Example: Robert, whom the policeman saw yesterday, is my uncle.

Which

Refers to both subjects and objects, but is used exclusively for animals or things, never for people.

Example: Where is the book which I left here?

Whose

Refers to people, animals, or things, indicating possession.

Example: Do you know the boy whose father is dead?

Where

Refers to a physical place.

Example: That is the school where I studied in 1998.